.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 21;
  background: #fff;
  -webkit-transition: box-shadow .5s;
  transition: box-shadow .5s;
}
.header>div {
  width: 1100px;
  margin: 0 auto;
}
.header>div .logo {
  float: left;
}


.header>div .logo>a .logo_pic {
  float: left;
  width: 41px;
  height: 52px;
  margin-top: 27px;
  background-image: url(./images/logo2x.png);
  background-size: contain;
  -webkit-transition: margin-top .5s,width .5s,height .5s;
  transition: margin-top .5s,width .5s,height .5s;
}

.header>div .logo>a .logo_name {
  float: right;
  margin-left: 7px;
  padding-top: 30px;
  -webkit-transition: padding-top .2s;
  transition: padding-top .2s;
}
.header>div .logo>a .logo_name, .header>div .logo>a .logo_pic {
  display: inline;
  box-sizing: border-box;
}
a, div, li, p{
  margin: 0;
  padding: 0;
  border: 0;
  vertical-align: baseline;
  background-repeat: no-repeat;
}

.header>div .logo>a .logo_name>p:first-child {
  font-size: 23px;
  font-weight: 500;
}

.header>div .logo>a .logo_name>p {
  margin: 0;
  padding: 0;
  line-height: 38px;
  color: #444;
  -webkit-transition: font-size .5s,line-height .5s;
  transition: font-size .5s,line-height .5s;
}

.header>div .logo>a .logo_name>p {
  line-height: 31px;
  color: #444;
  -webkit-transition: font-size .5s,line-height .5s;
  transition: font-size .5s,line-height .5s;
}
p {
  overflow: hidden;
  font: inherit;
}

.header>div .nav {
  float: left;
  margin-left: 10px;
  display: none;
}
.header>div .nav>ul {
  margin-right: 0px;
}
ol, ul {
  list-style: none;
}
.header>div .nav>ul>li {
  margin: 0 8px;
}
.header>div .nav>ul>li {
  float: left;
  box-sizing: border-box;
  margin: 0 13px;
  -webkit-transition: color .2s ease,border-bottom .2s ease,line-height .5s;
  transition: color .2s ease,border-bottom .2s ease,line-height .5s;
}

.header>div .nav>ul>li>a {
  display: block;
  box-sizing: border-box;
  height: 90px;
  border-bottom: 2px solid transparent;
  font-size: 15px;
  line-height: 90px;
  vertical-align: middle;
  color: #444;
  -webkit-transition: color .2s ease,border-bottom .2s ease,line-height .5s,height .5s;
  transition: color .2s ease,border-bottom .2s ease,line-height .5s,height .5s;
}

a {
  text-decoration: none;
  -webkit-transition: color .2s,border-bottom-color .2s;
  transition: color .2s,border-bottom-color .2s;
}
a, body, button, input, label, option, select, textarea {
  font-family: 'helvetica neue',arial,'hiragino sans gb','microsoft yahei',sans-serif;
  color: #444;
}

.people_right{
  float:right;
}
.people_left{
  float:left;
}

.header>div .userpanel {
  float: left;
  position: relative;
  box-sizing: border-box;
  margin-right: 5px;
  vertical-align: middle;
}

.userpanel_none{
  display: none;
  position: relative;
  line-height: 90px;
  -webkit-transition: line-height .5s;
  transition: line-height .5s;
}
.header>div .userpanel .userpanel_login {
  display: block;
  position: relative;
  line-height: 90px;
  -webkit-transition: line-height .5s;
  transition: line-height .5s;
}

.mod_btn {
  background-color: #fff;
  width: 140px;
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  box-sizing: border-box;
  height: 40px;
  padding: 0;
  font-size: 15px;
  display: inline-block;
  -webkit-transition: border-color .2s,color .2s,background-color .2s;
  transition: border-color .2s,color .2s,background-color .2s;
  line-height: 40px;
  text-align: center;
  text-decoration: none;
  margin-left: 10px;
  color: #666;
  border-color: #ededed;
}

.mod_btn:hover{
  color: #007cfa;
  border-color: #007cfa;
}

.header>div .nav>ul .nav_item-active>a {
  font-weight: 700;
  line-height: 89px;
}

.header-scroll>div .nav ul .nav_item-active>a {
  line-height: 49px
}

.header>div .nav>ul .nav_item-active>a,.header>div .nav>ul>li:hover>a {
  color: #222;
  border-bottom-color: #007cfa
}
.header>div .userpanel .userpanel_user {
  position: relative;
  cursor: pointer;
}
.userpanel_user_none{
  display: none;
}

.header>div .userpanel .userpanel_user .user_username {
  max-width: 80px;
  font-family: 'helvetica neue',arial,'hiragino sans gb','microsoft yahei',sans-serif;
}
.header>div .userpanel .userpanel_user .user_username {
  position: relative;
  max-width: 108px;
  margin-left: 5px;
  padding-right: 15px;
  font-size: 15px;
  color: #666;
  -webkit-transition: color .2s,line-height .5s;
  transition: color .2s,line-height .5s;
}
.header>div .userpanel .userpanel_user .user_arrow, .header>div .userpanel .userpanel_user .user_avatar, .header>div .userpanel .userpanel_user .user_username {
  display: inline-block;
  line-height: 90px;
  vertical-align: middle;
}
.header>div .userpanel .userpanel_user .user_arrow {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 5px 5px 0;
  border-color: #666 transparent transparent;
  -webkit-transition: line-height .5s,border-color .2s;
  transition: line-height .5s,border-color .2s;
}
.header>div .userpanel .userpanel_user .user_arrow, .header>div .userpanel .userpanel_user .user_avatar, .header>div .userpanel .userpanel_user .user_username {
  display: inline-block;
  line-height: 90px;
  vertical-align: middle;
}
.header>div .userpanel .userpanel_user .user_menu {
  width: 185px;
}

.header>div .userpanel .userpanel_user .user_menu {
  visibility: hidden;
  opacity: 0;
  z-index: -99;
  position: absolute;
  top: 82%;
  -webkit-transform: translate(0,5px);
  -ms-transform: translate(0,5px);
  transform: translate(0,5px);
  box-sizing: border-box;
  width: 179px;
  border: 1px solid #e6e6e6;
  border-radius: 3px;
  background-color: #fff;
  -webkit-transition: opacity .2s,-webkit-transform .2s,visibility .2s;
  transition: opacity .2s,transform .2s,visibility .2s;
  box-shadow: 0 3px 7px rgba(0,0,0,.2);
}
.header>div .userpanel .userpanel_user .user_menu .menu_list {
  padding: 14px 0;
  text-align: left;
}
.header>div .userpanel .userpanel_user .user_menu .menu_list:before {
  content: "";
  position: absolute;
  top: -16px;
  margin-left: 37px;
  width: 0;
  height: 0;
  border-width: 8px;
  border-style: solid;
  border-color: transparent transparent #e6e6e6;
}

.header>div .userpanel .userpanel_user .user_menu .menu_list:after {
  content: "";
  position: absolute;
  top: -14px;
  margin-left: 37px;
  width: 0;
  height: 0;
  border-width: 8px;
  border-style: solid;
  border-color: transparent transparent #fff;
}

.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item {
  padding: 0 20px;
}
.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item>a {
  display: block;
}
.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item-user .item_icon {
  width: 15px;
  height: 15px;
  background-repeat: no-repeat;
  background-image: url(./images/icon@1x.png?t=20151204);
  background-image: -webkit-image-set(url(./images/icon@1x.png) 1x,url(./images/icon@2x.png) 2x);
  background-position: 0 -890px;
}

.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item .item_icon {
  margin-right: 10px;
}
.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item .item_icon, .header>div .userpanel .userpanel_user .user_menu .menu_list .list_item .item_text {
  display: inline-block;
  line-height: 42px;
  vertical-align: middle;
}
.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item .item_text {
  font-size: 14px;
  color: #666;
}

.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item .item_icon, .header>div .userpanel .userpanel_user .user_menu .menu_list .list_item .item_text {
  display: inline-block;
  line-height: 42px;
  vertical-align: middle;
}

.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item-message .item_icon {
  width: 13px;
  height: 13px;
  background-repeat: no-repeat;
  background-image: url(./images/icon@1x.png?t=20151204);
  background-image: -webkit-image-set(url(./images/icon@1x.png) 1x,url(./images/icon@2x.png) 2x);
  background-position: -20px -890px;
}
.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item-message .item_icon-message {
  width: 16px;
  height: 18px;
  margin-left: 30px;
  font-size: 12px;
  line-height: 16px;
  color: #fff;
  vertical-align: middle;
  background-repeat: no-repeat;
  background-image: url(./images/icon@1x.png?t=20151204);
  background-image: -webkit-image-set(url(./images/icon@1x.png) 1x,url(./images/icon@2x.png) 2x);
  background-position: -80px -890px;
}
.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item-account .item_icon {
  width: 15px;
  height: 11px;
  background-repeat: no-repeat;
  background-image: url(./images/icon@1x.png?t=20151204);
  background-image: -webkit-image-set(url(./images/icon@1x.png) 1x,url(./images/icon@2x.png) 2x);
  background-position: -40px -890px;
}
.header>div .userpanel .userpanel_user .user_menu .menu_list .list_item-logout .item_icon {
  width: 13px;
  height: 14px;
  background-repeat: no-repeat;
  background-image: url(./images/icon@1x.png?t=20151204);
  background-image: -webkit-image-set(url(./images/icon@1x.png) 1x,url(./images/icon@2x.png) 2x);
  background-position: -60px -890px;
}


.header-scroll {
  box-shadow: 0 2px 4px 0 rgba(0,0,0,.15)
}

.header-scroll>div .logo>a .logo_pic {
  margin-top: 12px;
  width: 27.33px;
  height: 34.67px
}

.header-scroll>div .logo>a .logo_name {
  padding-top: 12px
}

.header-scroll>div .logo>a .logo_name>p {
  line-height: 27px;
}

.header-scroll>div .logo>a .logo_name>p:first-child {
  font-size: 19px;
}

.header-scroll>div .nav ul>li>a {
  height: 50px;
  line-height: 50px
}

.header-scroll>div .userpanel:before {
  height: 17px;
  margin-top: 18px
}

.header-scroll>div .userpanel .userpanel_login {
  line-height: 50px
}

.header-scroll>div .userpanel .userpanel_login .mod-btn {
  width: 90px;
  height: 34px;
  line-height: 34px
}
.header-scroll>div .userpanel .userpanel_none{
  line-height: 50px
}
.header-scroll>div .userpanel .userpanel_none .mod-btn {
  width: 90px;
  height: 34px;
  line-height: 34px
}

.header-scroll>div .userpanel .userpanel_user .user_arrow,.header-scroll>div .userpanel .userpanel_user .user_avatar,.header-scroll>div .userpanel .userpanel_user .user_username {
  line-height: 50px
}

.header-scroll>div .userpanel .userpanel_user .user_username .i-header-message {
  top: 5px
}

.header-scroll>div .userpanel .userpanel_user .user_menu {
  top: 98%
}
.header>div .userpanel .userpanel_user:hover .user_username {
  color: #007cfa
}
.header>div .userpanel .userpanel_user:hover .user_arrow {
  border-color: #007cfa transparent transparent
}
.header>div .userpanel .userpanel_user:hover .user_menu {
  visibility: visible;
  opacity: 1;
  -webkit-transform: translate(0,0);
  -ms-transform: translate(0,0);
  transform: translate(0,0)
}

.list_item:hover{
  background-color: #f5f5f5;
}
